Cheap Flights from Denver to St Louis
No deal from Denver to St Louis has cleared our price bar yet. What we have seen on the route is below.
Across 4 months of observations from Denver to St Louis, the lowest round-trip fare we recorded was $68, in August. The typical fare was $119. August was the cheapest month we saw and July the dearest.
The most recent price we saw on this route was $74 on Frontier, seen Oct 16. It is an unverified observation and may have changed.
See every deal <a href="/from/denver">from Denver</a>, <a href="/to/st-louis">to St Louis</a>, or the return direction <a href="/from/st-louis/to/denver">St Louis to Denver</a>.
Latest price we saw: Denver to St Louis
The most recent round-trip fare our sweep found on this route. It is not verified and may have changed since the date shown.
| From | Price | Per mile | Travel dates | Airline | Seen | Check price |
|---|---|---|---|---|---|---|
| Denver (DEN) to St Louis (STL) | $74 | 4.8¢ | Nov 13 – Nov 19 | Frontier | Oct 16 | Check price |
Price history: Denver to St Louis
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $68 | $112 | 22 |
| Sep 2026 | $68 | $105 | 17 |
| Aug 2026 | $68 | $136 | 125 |
| Jul 2026 | $124 | $124 | 1 |
Frequently asked questions
How many flight deals from Denver to St Louis are on Sparkflights right now?
There are 0 verified deals from Denver to St Louis on the board right now. The list refreshes hourly.
What is the lowest price ever seen from Denver to St Louis?
The lowest fare we've recorded from Denver to St Louis is $68, based on 165 price observations over 4 months.
How much does a flight from Denver to St Louis cost?
The typical round-trip fare we observed from Denver to St Louis is $119, against a recorded low of $68. These are observations, not quotes.
When is the cheapest month to fly Denver to St Louis?
August was the cheapest month we observed from Denver to St Louis and July the dearest, over 4 months of data.
What is the current price from Denver to St Louis?
The most recent fare our sweep saw from Denver to St Louis is $74, on Oct 16. It is an unverified observation rather than a verified deal, so check it before booking.